The major update includes no less than 36 security fixes which mitigate a variety of issues including XSS (cross-site scripting), same-origin bypass, and buffer overflow vulnerabilities. Notably, 26 of the fixes were contributed by external researchers who were collectively paid a total of more than $64,000 by Google for their efforts.

Chrome 55 also includes some improvements to usability, including keenly awaited tweaks to the V8 JavaScript engine which, according to internal tests, would provide a 50% average reduction in memory consumption. While this will have the most impact on devices with lower amounts of RAM, including smartphones and tablets, all users will stand to benefit from the V8 optimizations.

A more visual improvement included in Chrome 55 is the addition of CSS automatic hyphenation. This will become apparent when viewing line wrapped text with the aim of improving readability and consistency of paragraphed text.

When a user encounters a site lacking HTML5 capability, Chrome will prompt the user and ask them to permit the Flash content to run. However, in order to minimize disruption to the user experience, Google has exempted Flash-only websites in addition to the top ten websites, specifically: